Maybe I'm odd, but I enjoy cooking when touring, unless I'm totally worn out.
I carry a Trangia 1/2 man cookset, a Stanley flask and a ziplock bag of seasonings, spices, soy sauce, stock cubes, olive oil.
I'll always carry a couple of bags of quick boil noodles with seasonings, spam/tuna, fresh garlic, onion, tomato paste, pasta, couscous, and some kind of dried sausage -chorizo, fuet etc. Small tortillas that fit the Trangia pan. Also dried fruit and nuts and dark chocolate. Oh! And coffee!
I love porridge, but I cannot make it at home or on the road without it sticking to the pot, so my preferred breakfast is couscous with cinnamon, dark chocolate and dried fruit and nuts added after cooking.
Lunch can be a tortilla filled with tuna & onion, maybe some fresh peppers if handy. If cheese is handy, a quesadilla with cheese and chorizo can be delicious and warming on a colder day. Or just noodles. Alternatively, some honey, fruit and nuts and a bit of chocolate in a tortilla wrap can be delicious too.
Dinner is typically pasta, half cooked in a pot, transferred to the flask to finish, while sauce is made or from a packet with whatever additions I feel like.
Tomato paste, garlic, onion, some water and tuna can be delicious.
Aldi do some decent pre-made sauces.
A real treat is eggs! I always get a craving for eggs after a few days. If I see eggs for sale outside a farm, I'll often pick up half a dozen and make a simple omelette with whatever is in my bag, then hardboil the other eggs (for transport). They make a great snack.
For snacks I'll have the dark chocolate and dried fruits and nuts as well as some fruity biscuits.
I get a lot of use from my Stanley flask - short and broad for stability. I use it for finishing off pasta, eggs etc while cooking something else and for making coffee, or even carrying hot coffee when the weather is cold or wet. It saves setting up the stove at lunchtime.
I also use a "cosy" (aluminium foil bubblewrap) for my pot to hold heat in and protect my hands/legs when eating.
Olive oil is great because it can be used like butter on bread or to give extra calories when other resources are scarce. It can also be used as very reasonable shaving "foam"!
Of course, depending on where I am, the better option may be to skip cooking - Spain, for example has great food, very cheap but excellent quality so that it makes more sense to eat out than carry food. Or Germany has fantastic snack food like currywurst (washed down with a beer!) that would be sinful to ignore!
The one thing I've learned is always to have something in reserve!
And fuel!